Bug 146527

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User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.5)
Gecko/20041107 Firefox/1.0

Description of problem:
C program cannot allocate large amounts of memory on the first login
to Gnome, but works after a logout, login.

Begin Code----------------------

#include "stdlib.h"

#define ENTITY_COUNT 65530

typedef struct
   {
   double number0;
   double number1;
   double number2;
   double number3;
   int* int_array;
   }
   Memory_Block;

int
main(
   int          argc,
   const char** argv)
   {
   double* real_array0;
   double* real_array1;
   double* real_array2;
   double* real_array3;
   double* real_array4;
   double* real_array5;
   double* real_array6;
   double* real_array7;
   Memory_Block* block_ptr;
   int block_count = 0;

   /* Allocate 8 arrays to simulate permanent entities. */
   real_array0 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array1 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array2 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array3 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array4 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array5 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array6 = (double*)calloc(sizeof(double), ENTITY_COUNT);
   real_array7 = (double*)calloc(sizeof(double), ENTITY_COUNT);

   while (block_count < 100000000)
      {
      block_ptr = malloc(sizeof(Memory_Block));
      if (block_ptr)
          {
          block_ptr->number0 = block_count;
          block_ptr->number1 = block_count;
          block_ptr->number2 = block_count;
          block_ptr->number3 = block_count;

          block_ptr->int_array = (int*)calloc(sizeof(int), 30000);

          block_count++;
          if (block_count % 500 == 0)
             {      
             printf("Count %d\n", block_count);
             }
         }
      else
         {
         exit(1);
         }
      }
   }

End Code-----------------------------

A similar bug has been sent to caci.com where the program compiled
with thier library has problems allocating _after_ the first logout.
This does not occur when the program is run from a text console, only
when run under X. This is worse, but I was not able to create a simple
C program where this occurs.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. Reboot
2. Login to Gnome
3. Run the C program 1 or more times
4. Logout
5. Login
6. Run the C program
    

Actual Results:  On step 3, the program failed to malloc after
allocating a small amount of system memory.

On step 6, the program allocates alll available memory before the
malloc fails.

Expected Results:  The program should always behave as it does in step 6

Additional info:

Run under SMP and single processor kernels, with the latest patches
from RHN.

The machine is a dual processor AMD Athlon MP.